Working for the Energy Revolution

We Are Paving the Way to Sustainability

An upgrade of the existing transport infrastructure was carried out parallel to the construction of new wind turbines for the expansion of renewable energy generation capacities in the Swabian Jura region of Germany. A Wirtgen Group Production System made up of two Hamm rollers, a John Deere 622 GP Motor Grader, a cold recycler WR 240i, and a Streumaster SW 112 TC tractor-towed binding agent spreader were deployed on the project.

Obersontheim | Swabian Jura: Contractor Gebrüder Eichele GmbH undertook the rehabilitation of the road leading to a wind farm in southern Germany. The existing road surface was widened from 4.5 m to 7 m over a distance of 1,100 m. The entire surface of the existing road was processed in-situ by a Wirtgen recycler WR 240i. In the course of this process, the milling and mixing rotor homogenized the existing road surface and the base layer to a depth of 35 cm and simultaneously mixed in 49 kg per square meter of precisely pre-spread cement. This created a new cement-bound base layer with a width of 7 m. Despite the unsettled fall weather and the tight deadline, the construction phase was completed as planned within a period of 2 days. This phase was followed by the paving of an asphalt surface layer.

Cement was pre-spread on the treated surface by a Streumaster SW 112 TC tractor-towed spreader to enable the production of a new, cement-treated base layer.

The WR’s powerful milling and mixing rotor homogeneously mixes the material and the pre-spread cement to a depth of 35 cm. Water is simultaneously injected into the mixing chamber via an injection bar.

The first pre-compaction pass is carried out by a H 7i CompactLine compactor following behind the WR.

After the first pre-compaction pass, the John Deere Motor Grader grades the base layer material with a cross-slope of 3%.

Final compaction was also carried out by a Hamm HC 130i compactor.

Spreading cement with a tractor-towed spreader

View of the complete Production System for soil stabilization

Precision at the Press of a Button

Surface grading is made significantly easier by the unique Auto-Pass function from John Deere. The press of a button is all it needs to place the grader moldboard on the ground and activate the Grade Pro system. At the end of a pass, the moldboard is raised again and turned to automatically replicate the desired grade value. This means that the Motor Grader no longer has to return to the starting point and start all over again from there.

“We are extremely satisfied with the John Deere Motor Grader. The automation offered by the Auto-Pass function was really useful, particularly here. Just one press of a button sets the cross-slope we need after turning the machine.”

Heinrich Eichele jun., Managing Director

Intact Transport Infrastructure Is Essential for the Expansion of Renewable Energy Generation Capacities

We are currently seeing growing reliance on sustainable and renewable energy sources around the globe. In view of this, the search is on for suitable sites for photovoltaic plants, wind farms etc. in a wide range of different regions. A well-developed transport infrastructure for enabling access to these sites and the construction of new plants is essential. In order to make road construction as environmentally friendly and sustainable as possible, the Wirtgen Group relies on cutting-edge technologies that help to minimize the overall emissions of each construction process.

You can find out more about the Wirtgen Group’s sustainability goals here.

Checked and approved: Thanks to Grade Pro automatic grade control, the John Deere 622 GP grades the cross-slope of the planned road surface to exactly 3%.

Wirtgen Group Machines Deployed:

Streumaster: SW 112 TC
Wirtgen: WR 240i
John Deere: 622 GP
Hamm: H 7i
HC 130i

Project Parameters:

Length:: 1,100 m
Width:: 4.50 m widened to 7.00 m
Cement added:: 49 kg/m²
Working depth:: 35 cm
Cross-slope on each side:: 3%